More compliance with LSB

The init-script shall return 4 in case then user doesn't have sufficient privileges for action.
See http://refspecs.freestandards.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>

src/ejabberdctl.template

@@ -70,7 +70,7 @@ if [ "$ID" -eq "$EJID" ] ; then
 fi
 if [ "$EXEC_CMD" = "false" ] ; then
 	echo "This command can only be run by root or the user $INSTALLUSER" >&2
-	exit 1
+	exit 4
 fi
 
 NAME=-name